Pipe marking gauge



Nov. 19, 1957 H, F, BRUNING 2,813,343

" PIPE MARKING GAUGE Filed March l, 1957 United States Patent O PIPE MARKING GAUGE Herman F. Bruning, Blairmore, Alberta, Canada Application March 1, 1957, Serial No. 643,336

2 Claims. (Cl. 33-21) This invention relates generally to instruments utilized for making pipe or conduit layouts wherein a pair of intersecting conduits may be properly scribed and formed for the purpose of joining the same in intersecting angular relationship.

Various means have been heretofore utilized for the purpose of marking a conduit to be secured in intersecting relationship with a cooperating conduit for forming a branch layout therebetween. Various types of templates have been proposed, however, none of which have proved entirely satisfactory.

A primary object of invention is to provide an improved pipe marking gauge incorporating an adjustable scribe or marker for laying out the intersecting portions of conduits preparatory to joining the same for forming a branch layout.

A still further object of invention in conformance with that set forth is to provide in a pipe marking gauge of the character involved pivotal retaining means secured on opposite sides of an elongated support member supporting a suitable marker or scribe wherein said retaining means may be pivoted in angular relationship relative to the support member for accommodating the pipe marking gauge on conduits of varying diameters.

A still further object of invention in conformance with that set forth is to provide a pipe marking gauge of the character involved which is readily and economically manufactured, easily used, and highly satisfactory and practical for the purpose intended.

These together with other objects and advantages which will subsequently become apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawing forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure l is a perspective view of the pipe marking gauge showing the same disposed upon a fragmentary portion of a pipe or conduit;

Figure 2 is a section taken substantially on the plane of line 2-2 of Figure 1;

Figure 3 is a section taken substantially on the plane of line 3-3 of Figure 2; and

Figure 4 is a diagrammatic plan view showing the manner in which a branch layout is formed on a pair of conduits to be secured in intersecting angular relationship.

Referring to the drawing in detail, mounted on a fragmentary portion of a first conduit indicated generally at C is the novel pipe marking gauge indicated generally at 10. The pipe marking gauge incorporates an elongated support member 12 having a substantially U-shaped cross section, see Figure 2, including a transverse web 14 and a pair of mutually parallel side flanges 16 and 18. The anges 16 and 18 incorporate in laterally extending relationship on inner surface portions thereof support rails or ribs 20 and 22, respectively, defining a longitudinally extending pair of opposed guide tracks reciprocably sup- Patented Nov. 11.9, 1957 ICC porting therein an elongated plate-like scribe member 24. The scribe member 24 incorporates a plurality of longitudinally spaced transverse apertures 26 and terminates in a downwardly turned sharpened end portion 28.

Integral with opposite side edges of the support member 12 `at the intersection between the flanges and the web thereof are longituidnally spaced tubular pivot sleeve portions 30 pivotally connected to interdigitated and axially alignable support sleeves 32 of laterally extendible pivotal 0 support wings 34. The interdigitated sleeves 30 and 32 will be retained in their pivotal relationship by means of suitable elongated pivot pins 36. Each of the wings 34 incorporate at their outer edges tubular open ended sleeve portions 38 incorporating therein elongated bar magnets 40 which will be magnetically attracted to the conduit C in the event a ferrous material is utilized.

Considering Figure 4, the conduit C is disposed in angular relationship to an intersecting conduit C. The support member 12 is disposed on the conduit C in the manner shown in Figure 4, i. e. in parallel relationship to the longitudinal axis of conduit C, and points are scribed through the aperture 26 and at the terminal end of the scribe element or member 24. The support member 12 is progressively moved around the circumference of the conduit C, pairs of complementary points being scribed by means of the aperture 26 and the terminal end of the scribe member 24 thus defining on the end of the conduit C a pattern indicated by means of phantom lines dening the manner in which the end of the conduit C should be formed to cooperate with an opening in the conduit C to accordingly form the proper joint between a pair of intersecting conduits.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claims.

What is claimed as new is as follows:

l. In an instrument for use in branch layouts between intersecting conduits comprising a support member juxtapositionable longitudinally of the outer surface of a first conduit, an extensible and retractible scribe member reciprocably supported on the support member, transverse aperture means through an intermediate portion of the scribe member, the terminal end and the aperture portion of the scribe member defining a pair of complementary points of a branch layout of a pair of intersecting conduits; means for detachably retaining the support member on the first conduit, said means comprising a pair of opposed laterally extending support wing members pivotally secured at one edge longitudinally of the support member, and detachable fastening means engageable on the outer surface of the first conduit permitting the support member to be alternately positioned about the circumference of said first conduit wherein the scribe member will progressively define complementary points of a branch layout between the first conduit and an intersecting conduit, said wing members being pivotal to accommodate the support member on conduits of varying diameters.

2. In an instrument for use in branch layouts between intersecting conduits comprising a support member juxtapositionable longitudinally of the outer surface of a first conduit, an extensible and retractible scribe member reciprocably supported on the support member, transverse aperture means through an intermediate portion of the scribe member, the terminal end and the aperture portion of the scribe member defining a pair of complementary points of a branch layout of a pair of intersecting conduits; means for detachably retaining the support member on the rst conduit, said means comprising a pair of opposed laterally extending support wing members pivotally secured at one edge longitudinally of the support member, and detachable fastening means engageable on the outer surface of the rst conduit permitting the support member to be alternately positioned about the circumference of said first conduit wherein the scribe member will progressively dene complementary points of a branch layoutbetween the rst conduit and an intersecting conduit, said wing members being pivotal to accommodate the support member on conduits of varying diameters, said detachable fastening means comprising bar magnets extending along the edge of the wing members remote from the pivotal connection thereof with the support member.

No references cited. 

